Union Butterfield 1050128 1500A General Purpose Straight Flute Hand Tap, Right Hand Cutting, 5/8-18 Thread, H3 Thread Limit, Plug Chamfer, 4 Flutes, Steam Oxide, HSS
Steam oxide treated to reduce wear and chip welding in harder ferrous materials
Steam tempering gives a strongly adhering blue oxide surface that acts to retain cutting fluid and prevent chip to tool welding, thereby counteracting the formation of a built-up edge
Steam tempering can be applied to any bright tool but is most effective on drills and taps
A medium alloyed high speed steel that has good machinability and good performance
HSS exhibits hardness, toughness and wear resistance characteristics that make it attractive in a wide range of applications